How to get the sequence of numbers back after random number generation

Am in the middle of an encryption algorithm, I have written the code to randomly shuffle a series of numbers in java. Here is the code:

public class permute6 {
public static void main(String args[])
{
    Random rand = new Random();
    int arr[] = {10,20,30,40,50,60,70,80};// Original Array

    System.out.println("Original array is" );
    for(int k = 0; k<arr.length;k++ )
        System.out.print(arr[k] +  "\t" );
    System.out.println(" ");

    int max = arr.length - 1;
    int min = 0;
    int rnum;
    int larr = arr.length - 1;
    int[] parr = new int[arr.length];// to store the permuted array 
    int flag = 0;// 'flag' to flag the recurring number
    int plen = parr.length - 1;
    for(int i = 0 ; i < arr.length ; i++)
    {
             rnum = (rand.nextInt((max-min)+1) + min);// roll for the     
                    random number
             parr[plen] = arr[rnum];
             arr[rnum] = arr[larr];

             larr--;// to reduce the size of the original array
             plen--;// to make the parr to act like a stack
             max--;
    }

    System.out.println("Permuted array is" );
    for(int k = 0; k<arr.length;k++ )
        System.out.print(parr[k] +  "\t" );

    System.out.println();
  }
  }

If the initial array is {10,20,30,40,50,60,70,80}

then one of the shuffled result is

50 20 30 10 60 80 70 40

Now if I transmit this array, then how to get back the original sequence at the destination side? What can be done to keep track of the sequence? What is missing here....Any help is appreciated!!